Window treatment accessory



FIG. 1 is an environmental perspective view of a window treatment accessory, showing my new design;

FIG. 2 is an enlarged front view thereof, shown separately for clarity of illustration;

FIG. 3 is an enlarged side elevation view of FIG. 2 , the opposite side and the top and bottom views being identical to that shown; and,

FIG. 4 is an enlarged rear view of FIG. 2 .

The broken line showing of environmental structure in FIGS. 1 and 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a window treatment for a window treatment accessory, as shown and described. 